[CentOS] yum and yumex change system time
Johnny Hughes
johnny at centos.org
Wed Jun 24 01:25:16 UTC 2015
On 06/23/2015 04:47 PM, g wrote:
>
> Richard, thank you for your response.
>
>
> On 06/23/2015 02:51 PM, Richard wrote:
> <<>>
>
>> I agree, so my questions are:
>>
>> - what is your TZ?
>
> u.s.a. 'central time zone' - currently on 'daylight savings time'.
>
>> - what does "[/bin/]date" show?
>
> [geo at boxen ~]$ date
> Tue Jun 23 14:54:42 CDT 2015
>
>> - what does your hardware clock: "/sbin/hwclock --show" report?
>> [need to be root to use that command]
>
> [geo at boxen ~]$ sudo hwclock --show
> [sudo] password for geo:
> Tue 23 Jun 2015 02:55:40 PM CDT -0.899861 seconds
>
>> - is your /etc/localtime file a standalone file or a symlink
>> to /usr/share/zoneinfo/... ?
>
> currently it is a copy of file from /usr/share/zoneinfo/ on advice
> from a post to this list when i had problem getting correct time to
> show in clock in panel.
>
>> - if a symlink, to what file?
>
> see above answer.
>
>> - what is the timestamp on the localtime (or what it's
>> symlinked to) file?
>
> 2015-06-18 20:50
>
> this file was copied several months ago so time stamp shows file has
> been updated.
>
>> - what does "zdump -v /etc/localtime" return ? i.e., is it for
>> the correct TZ?
>
> [geo at boxen ~]$ zdump -v /etc/localtime
> /etc/localtime -9223372036854775808 = NULL
> /etc/localtime -9223372036854689408 = NULL
> /etc/localtime Sun Nov 18 17:59:59 1883 UTC = Sun Nov 18 12:09:23
> 1883 LMT isdst=0 gmtoff=-21036
>
> <one hell of a long list snipped>
>
> /etc/localtime Sun Nov 1 06:59:59 2499 UTC = Sun Nov 1 01:59:59
> 2499 CDT isdst=1 gmtoff=-18000
> /etc/localtime Sun Nov 1 07:00:00 2499 UTC = Sun Nov 1 01:00:00
> 2499 CST isdst=0 gmtoff=-21600
> /etc/localtime 9223372036854689407 = NULL
> /etc/localtime 9223372036854775807 = NULL
>
> [geo at boxen ~]$ zdump -v CDT /etc/localtime
> CDT -9223372036854775808 = NULL
> CDT -9223372036854689408 = NULL
> CDT 9223372036854689407 = NULL
> CDT 9223372036854775807 = NULL
> /etc/localtime -9223372036854775808 = NULL
> /etc/localtime -9223372036854689408 = NULL
> /etc/localtime Sun Nov 18 17:59:59 1883 UTC = Sun Nov 18 12:09:23
> 1883 LMT isdst=0 gmtoff=-21036
> /etc/localtime Sun Nov 18 18:00:00 1883 UTC = Sun Nov 18 12:00:00
> 1883 CST isdst=0 gmtoff=-21600
> /etc/localtime Sun Mar 31 07:59:59 1918 UTC = Sun Mar 31 01:59:59
> 1918 CST isdst=0 gmtoff=-21600
>
> <similar hell of a long list like above>
>
> /etc/localtime Sun Nov 1 06:59:59 2499 UTC = Sun Nov 1 01:59:59
> 2499 CDT isdst=1 gmtoff=-18000
> /etc/localtime Sun Nov 1 07:00:00 2499 UTC = Sun Nov 1 01:00:00
> 2499 CST isdst=0 gmtoff=-21600
> /etc/localtime 9223372036854689407 = NULL
> /etc/localtime 9223372036854775807 = NULL
>
> [geo at boxen ~]$ zdump -v CDT
> CDT -9223372036854775808 = NULL
> CDT -9223372036854689408 = NULL
> CDT 9223372036854689407 = NULL
> CDT 9223372036854775807 = NULL
>
> so, yes. i am in 'central time zone' observing 'daylight savings time'.
>
>
Edit the file:
/etc/sysconfig/clock
make sure to set:
ZONE="America/Chicago"
then copy /usr/share/zoneinfo/America/Chicago to /etc/localtime
Run the time tool and make sure that "System clock uses UTC" is NOT checked
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